oj.uz

Submission #140683

# Submission time Handle Problem Language Result Execution time Memory
140683 2019-08-04T12:42:20 Z khrbuddy03 None (KOI17_civilization) C++14
54 / 100
 1000 ms 54092 KB 
#include <bits/stdc++.h>

using namespace std;

const int inf = 2e3 + 9;
const int dx[4] = {-1, 1, 0, 0};
const int dy[4] = {0, 0, -1, 1};

struct ds {
    int par[inf * inf], siz[inf * inf];
    inline int find(int u) {
        if (u == par[u]) return u;
        return par[u] = find(par[u]);
    }
    inline void merge(int u, int v) {
        u = find(u); v = find(v);
        if (u == v) return;
        par[u] = v;
        siz[v] += siz[u];
        siz[u] = 0;
    }
} cul;

int n, m;
int vis[inf][inf];

int main() {
    ios::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    cin >> n >> m;
    for (int i = 0; i < n * n; ++i) cul.par[i] = i;
    memset(vis, -1, sizeof(vis));
    queue<pair<int, pair<int, int>>> q;
    for (int i = 0; i < m; i++) {
        int x, y; cin >> x >> y;
        cul.siz[--y * n + --x] = 1;
        q.push(make_pair(0, make_pair(y, x)));
        vis[y][x] = y * n + x;
    }
    while (!q.empty()) {
        int dist = q.front().first;
        int y = q.front().second.first, x = q.front().second.second;
        int here = y * n + x;
        q.pop();
        cul.merge(here, vis[y][x]);
        for (int i = 0; i < 4; ++i) {
            int ny = y + dy[i], nx = x + dx[i];
            if (ny < 0 || ny >= n || nx < 0 || nx >= n) continue;
            int there = ny * n + nx;
            if (cul.siz[cul.find(there)] && cul.siz[cul.find(here)]) cul.merge(there, here);
            if (vis[ny][nx] == -1) {
                q.push(make_pair(dist + 1, make_pair(ny, nx)));
                vis[ny][nx] = here;
            }
        }
        if (cul.siz[cul.find(here)] == m) {
            cout << dist << '\n';
            break;
        }
    }
}

Subtask #1
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 16252 KB Output is correct
2 Correct 15 ms 16248 KB Output is correct
3 Correct 16 ms 16248 KB Output is correct
4 Correct 16 ms 16248 KB Output is correct
5 Correct 16 ms 16248 KB Output is correct
6 Correct 16 ms 16248 KB Output is correct
7 Correct 15 ms 16248 KB Output is correct
8 Correct 17 ms 16248 KB Output is correct
9 Correct 16 ms 16248 KB Output is correct
10 Correct 15 ms 16248 KB Output is correct
11 Correct 14 ms 16248 KB Output is correct
12 Correct 16 ms 16220 KB Output is correct

Subtask #2
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 16252 KB Output is correct
2 Correct 15 ms 16248 KB Output is correct
3 Correct 16 ms 16248 KB Output is correct
4 Correct 16 ms 16248 KB Output is correct
5 Correct 16 ms 16248 KB Output is correct
6 Correct 16 ms 16248 KB Output is correct
7 Correct 15 ms 16248 KB Output is correct
8 Correct 17 ms 16248 KB Output is correct
9 Correct 16 ms 16248 KB Output is correct
10 Correct 15 ms 16248 KB Output is correct
11 Correct 14 ms 16248 KB Output is correct
12 Correct 115 ms 24056 KB Output is correct
13 Correct 87 ms 23928 KB Output is correct
14 Correct 115 ms 24056 KB Output is correct
15 Correct 84 ms 23928 KB Output is correct
16 Correct 30 ms 22396 KB Output is correct
17 Correct 295 ms 28280 KB Output is correct
18 Correct 322 ms 28284 KB Output is correct
19 Correct 302 ms 28280 KB Output is correct
20 Correct 285 ms 28280 KB Output is correct
21 Correct 342 ms 28432 KB Output is correct
22 Correct 27 ms 24060 KB Output is correct
23 Correct 136 ms 24048 KB Output is correct
24 Correct 16 ms 16220 KB Output is correct

Subtask #3
0 / 46.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 16252 KB Output is correct
2 Correct 15 ms 16248 KB Output is correct
3 Correct 16 ms 16248 KB Output is correct
4 Correct 16 ms 16248 KB Output is correct
5 Correct 16 ms 16248 KB Output is correct
6 Correct 16 ms 16248 KB Output is correct
7 Correct 15 ms 16248 KB Output is correct
8 Correct 17 ms 16248 KB Output is correct
9 Correct 16 ms 16248 KB Output is correct
10 Correct 15 ms 16248 KB Output is correct
11 Correct 14 ms 16248 KB Output is correct
12 Correct 115 ms 24056 KB Output is correct
13 Correct 87 ms 23928 KB Output is correct
14 Correct 115 ms 24056 KB Output is correct
15 Correct 84 ms 23928 KB Output is correct
16 Correct 30 ms 22396 KB Output is correct
17 Correct 295 ms 28280 KB Output is correct
18 Correct 322 ms 28284 KB Output is correct
19 Correct 302 ms 28280 KB Output is correct
20 Correct 285 ms 28280 KB Output is correct
21 Correct 342 ms 28432 KB Output is correct
22 Correct 27 ms 24060 KB Output is correct
23 Correct 136 ms 24048 KB Output is correct
24 Correct 323 ms 45320 KB Output is correct
25 Correct 408 ms 47736 KB Output is correct
26 Correct 277 ms 46584 KB Output is correct
27 Correct 308 ms 45688 KB Output is correct
28 Correct 227 ms 45316 KB Output is correct
29 Execution timed out 1058 ms 54092 KB Time limit exceeded
30 Halted 0 ms 0 KB -